Clutch construction for tapping attachments and the like



Nov. 3I 1925.

- G. w. EMRICK CLUTCH CONSTRUCTION FOR TAPPING ATTACHMENTS AND THE LIKE;

Filed June 29. 1923 INVENTOR eoW Emrwz/ ATTORNEYS Patented Nov. 3, 1925.

UNITEDg STATES y 1,559,944 .PA'IENTl OFFICE. i

GEORGE 1V. EIRICK,' OF BROOKLYN, 'NEN YORK.

CLUTCH CONSTRUCTION non TAPPING ATTACHMENTS AND THE LIKE.

Application filed func 29, 1923.

To r/,ZZ whom it may concern.' Be 1t known that l, GEORGE Vf. Firmen,

va citizen of the United States, and residing` use the same.

This invention relates to clutch constructions and particularly to devices of this class` designed for use in connection with tapping attachments and other apparatus where any clutches of the class under consideration may be used, and the object of the in'- vention is to provide a clutch device composed of two clutch members of conical construction and an intermediate clutch having inner and outer facings adapted to cooperate with said clutch members, said intermediate clutch being mounted on a movable spindle whereby the same may be moved into engagement with the separate clutch members to govern predetermined transmissions of power or the rotation of elements in predetermined direction; a further object being to provide a clutch of the class and for the purpose specified which is automatic and yet positive in operation, means being provided to allow for the slippage of said clutch members one upon the other when subjected to excess stress or strain; and with these and other objects in view the invention consists in a clutch construction of the class and for the purpose specified which is constructed as hereinafter described and claimed. i

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Fig. 1 is a sectional view through a tapping attachment showing my improved clutch construction and indicating one method of its use;

Fig. 2 a view similar to Fig. 1 on an enlarged scale and showing only a part of the construction; and

Fig. 3 a view similar to Figs. 1 and 2 but showing only a part of the construction shown in said figures.

In'Fig. 1 of the drawing, I have shown Serial No. 648,465. l

for the purpose of illustrating one use' of my clutch device a tapping attachment such shownand described in Letters-Patent of the United States No. 1,506,367, dated August 26, 1924, and in Fig. 1, 5 represents a cup-shaped casing having anA extension 6 at one side, said casing 4and extension being open at the top and closed by a cover 7 kheld in position by screws 8, and at one side of the extension 6 is' a projecting post 9 in connection withA which a rod 10 may be connected to permit of the mountingand handling of the attachment.

The casing 5 is provided with a bearing portion 11 and the cover 7 with a similar bearing portion 12, and a tapered shaft 13 is mounted in the bearing 12 and projects therefrom and by means of which theattachment may be mounted in connection with a suitable machine.

The shaft 13 is provided with a liange 14Tk and a shaft' 15 is mounted in the casing and provided with a flange 16,v and the shafts 13 and 15 are in threaded engagement with each other as indicated in .dotted lines in Fig. 1. The'shaft 15 extends downwardly' into -a sleevey portion 17 which 'extends through the bottom of thecasing 5 andv said sleeve is provided with an angular head 18 to receive asuitable chuck 'device 19 which device is adapted to support aqtap or other tool 2O as shown in Fig. 1.7

Mounted on and forming a part of' the sleeve 17 is a clutch element 21 which is conical in form in the construction shown, and the inner and outer faces of which are provided with suitable clutch facings 22 and 23, and the clutch element 2,1,is'held against displacement on the sleeve 17 by a nut 211 and by interlocking means as shownfat,2,! l in Figs. 2 and 3 of theV drawing but in Fig. 3 the clutch facings 22 and 23 are omitted. It will be noted that a clearance is provided between the top of the clutch element and the nut 24 and clearance is also provided between the bore of the element 21 and the sleeve 17, thus permitting of slight lateral movement of the element 21 on the sleeve 17. The element 21 as will be apparent is movable toward and from the clutch members 26 and 27 by the upward and downward movement of the sleeve 17 or the chuck 19 mounted thereon, and this construction provides a full fioating clutch element las will be apparent.

Mounted in the casing 5 are inner and outer clutchy members 26 and 27 both of which are conical in form and the inner clutch member 26 is rotatably mounted on the sleeve 17 4and adapted to cooperate with the inner clutchfacing 22, while the outer clutch member is secured to the shaft 15, or the flange 16 thereof, by screws 28 as clearly shown in Fig. 2 of the drawing, and said last named clutch member is provided with a gear 29 which is adapted to mesh with a gear` 30 on a shaft 31 mounted vertically in the enlarged portion 6 of the cas- -ing 5, and mounted on the shaft 31 is another gear 32 coupled with the gear 30 through a sleeve portion 33, and said last named gear is in operative connection with a gear 34 on the inner clutch member 26 through a pinion 35 rotatably mounted in rthe casing 5 as clearly shown in Fig. 1.

From the foregoing it will be appare-nt that in the rotation of the shaft 13 by a `suitable power source the outer clutch member 27 will be positively rotated through its gravity upon and is rotated by the inner clutch member 26. ln entering the tool or tap 20 in a workpiece the pressure of the tap onl such workpiece will automatically raise the clutch element 2l in the casing 5 and into engagement with the outer clutch member 27 and will be rotated to perform the desired function or operation. ln removing the tap or other tool 20 from the workpiece by the upward movement of the casing 5 in the usual manner the clutch ele ment 21 will be automatically `moved out of engagement with the clutch member 27 and into engagement with the clutch mem# ber 26 to drive the tool 2O in the Vopposite direction.

necessarily limited to this use thereof, the

distinctive feature of my invention being` to provide a clutch construction composed of inner and outer clutch members and an intermediate and floating clutch element adapted to operate inv connection with either t of said clutch members and to be driven in opposite directions thereby, and various changes in and modifications of the construction herein shown and`described may be made, within the scope of the appended claims, without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what l claim as new and desire to secure by Letters Patent, is y y 1. ln a device of the class described provided with two rotatable conical members mounted one within thegother, a conical clutch member mounted between said rotatable members and provided with clutch facings adapted to operate in connection with either of said members, and means for providing a full ioating mounting for said clutch member. A

2. Inv a clutch mechanism of the class described employing two clutch members, a two-faced conical full floating clutch element, friction facings mounted on the inner and outer faces of said clutch'element, and means for supporting a member in connection with said clutch element.

Intestimony that I claim the foregoing esoneri w. EMRICK. 

